TLC555 2.1-MHz, 250-µA, Low-Power Timer | TI.com

TLC555
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2.1-MHz, 250-µA, Low-Power Timer

2.1-MHz, 250-µA, Low-Power Timer - TLC555
Datasheet
 

Description

The TLC555 is a monolithic timing circuit fabricated using the TI LinCMOS™ process. The timer is fully compatible with CMOS, TTL, and MOS logic and operates at frequencies up to 2 MHz. Because of its high input impedance, this device supports smaller timing capacitors than those supported by the NE555 or LM555. As a result, more accurate time delays and oscillations are possible. Power consumption is low across the full range of power-supply voltage.

Like the NE555, the TLC555 has a trigger level equal to approximately one-third of the supply voltage and a threshold level equal to approximately two-thirds of the supply voltage. These levels can be altered by use of the control voltage terminal (CONT). When the trigger input (TRIG) falls below the trigger level, the flip-flop is set and the output goes high. If TRIG is above the trigger level and the threshold input (THRES) is above the threshold level, the flip-flop is reset and the output is low. The reset input (RESET) can override all other inputs and can be used to initiate a new timing cycle. If RESET is low, the flip-flop is reset and the output is low. Whenever the output is low, a low-impedance path is provided between the discharge terminal (DISCH) and GND. All unused inputs must be tied to an appropriate logic level to prevent false triggering.

Features

  • Very low power consumption:
    • 1-mW typical at VDD = 5 V
  • Capable of operation in astable mode
  • CMOS output capable of swinging rail to rail
  • High output current capability
    • Sink: 100-mA typical
    • Source: 10-mA typical
  • Output fully compatible with CMOS, TTL, and MOS
  • Low supply current reduces spikes during output transitions
  • Single-supply operation from 2 V to 15 V
  • Functionally interchangeable with the NE555; has same pinout
  • ESD protection exceeds 2000 V per MIL-STD-883C, method 3015.2
  • Available in Q-temp automotive
    • High-reliability automotive applications
    • Configuration control and print support
    • Qualification to automotive standards

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Parametrics

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Part number Order VCC (Min) (V) VCC (Max) (V) Iq (Typ) (uA) Rating Operating temperature range (C)
TLC555 Order now 2     15     250     Catalog     -40 to 125
-40 to 85
0 to 70